Unhelpful "not a function" error when missing a semicolon

[HMPerson1]

This code (playground):

fn foo() {}
fn bar() -> (i32, i32) {
    foo() // missing semicolon
    
    (0, 0)
}

gives the unhelpful error message:

error[E0618]: expected function, found `()`
 --> src/main.rs:3:5
  |
3 | /     foo() // missing semicolon
4 | |     
5 | |     (0, 0)
  | |__________^ not a function

Happens on 1.26.0-stable and 1.28.0-nightly (2018-05-23 29ffe51).

[zackmdavis]

(need to sleep now, but I'll put up a pull request for this tomorrow)

zmd@ReflectiveCoherence:~/Code/Misc$ rustc +stage1 scratch.rs 
error[E0618]: expected function, found `()`
 --> scratch.rs:3:5
  |
3 |       foo() // missing semicolon
  |       ^    - help: try adding a semicolon: `;`
  |  _____|
  | |
4 | |
5 | |         (0, 0)
  | |______________^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0618`.